KR20200131415A - High power magnetron with asymmetric tuner module - Google Patents

Abstract

The present invention relates to a high-power magnetron. The high-power magnetron comprises: a dipole tube including a negative electrode and a positive electrode; and a plurality of tuner units varying an electric field formed in the dipole tube. The tuner unit includes a tuner pin and a tuner rod formed to be spaced apart by a tuner gap. The plurality of tuner units are in an asymmetric structure. According to the present invention, by applying an asymmetric tuner, an internal resonance frequency of the high-power magnetron can be more precisely adjusted. By designing the tuner rod and tuner pin of the asymmetric tuner unit in an asymmetric shape, the step of the variable internal resonance frequency of the high-power magnetron can be precisely designed according to a request of a user.

Description

High power magnetron with asymmetric tuner unit TECHNICAL FIELD

The present invention relates to a high-power magnetron including an asymmetric tuner, and more specifically, to a high-power magnetron capable of precisely controlling an operating frequency of a high-power magnetron by using a plurality of tuner portion structures having an asymmetric structure.

The magnetron oscillator converts the electric energy of an electron beam generated in a high vacuum where an electric field and a magnetic field are applied vertically to each other, and radiates it into high-power electromagnetic wave energy. It is a high-efficiency, high-output electromagnetic wave generator.

These magnetron oscillators were first devised in the 1930s, and starting with World War II, R&D began in earnest in the UK and the US for radar application. Currently, it is widely used in the fields of industry, defense, medical care, environment, science, and energy using the characteristics of magnetron oscillators.

The magnetron oscillator may be composed of a cathode generating an electron beam, a resonator having a constant operating frequency, and an output unit having an antenna structure for radiating electromagnetic waves generated from the resonance circuit to the outside. More specifically, due to an electric field caused by a voltage applied between the cathode and the anode and a magnetic field applied in the axial direction, the electron beam generated at the cathode rotates in each direction according to Lorentz force. At this time, the rotating electron beams resonate at a specific frequency with the resonant circuit, and through this, they are spatially aggregated to have an AC component. An electromagnetic wave having an operating frequency is generated in a resonance circuit by the AC component of the electron beam, and the generated electromagnetic wave is radiated to the outside through an output unit composed of an antenna. The frequency of the electromagnetic wave generated by the magnetron oscillator may generate electromagnetic waves ranging from a microwave band to a terahertz wave band, depending on conditions causing resonance.

For example, in the case of a high-power magnetron, it is used to accelerate the electron beam by supplying high-power RF into the linear accelerator by combining it with a linear accelerator (LINAC). The resonant frequency of the accelerator and the RF frequency of the magnetron must be matched. To this end, in the case of a high-power magnetron, a tuning structure is mostly installed in one part, and the frequency of oscillation from the magnetron is adjusted by using the electric field change according to the gap distance in the installed tuning structure. In this case, as the gap increases in order to change the frequency, the output increases along with the frequency increase, but there is a problem that the oscillation rapidly becomes unstable when the gap deviates from a certain distance.

1 is a view showing the structure of a conventional high-power magnetron including a symmetric tuner unit.

Referring to FIG. 1, there is a method of solving the above problem by installing tuning structures 110 and 120 of a high-power magnetron in a symmetrical shape on both sides. However, the high-power magnetron having two tuning structures installed in a symmetrical shape can widen the variable width of the electromagnetic wave frequency generated in the high-power magnetron, but there is a problem that it cannot precisely control the electromagnetic wave frequency generated in the high-power magnetron.

It is an object of the present invention to solve the above and other problems.

Another object of the present invention is to provide a high-power magnetron capable of precisely controlling an electromagnetic wave frequency by applying an asymmetric tuner.

In addition, it is to provide a high-power magnetron capable of precisely designing an adjustable frequency step (FREQUENCY STEP) according to a user's request by asymmetrically designing the sectional area or height of the tuner rod and the tuner pin of the asymmetric tuner unit.

According to an aspect of the present invention in order to achieve the above or other objects, in a high-power magnetron, a dipole tube including a cathode and an anode, and a plurality of tuner units for varying an electric field formed in the dipole tube, the tuner It provides a high-power magnetron including a tuner pin and a tuner rod spaced apart by a tuner gap, wherein the plurality of tuner portions have an asymmetric structure.

In addition, each of the tuner pins included in the plurality of tuners may have different shapes from each other.

In addition, each of the tuner pins included in the plurality of tuners may have a pillar shape having different cross-sectional areas.

In addition, each of the tuner pins included in the plurality of tuners may have a pillar shape having different heights.

In addition, each tuner rod included in the plurality of tuner units may have different shapes from each other.

In addition, each tuner rod included in the plurality of tuners may have a pillar shape having different cross-sectional areas.

In addition, each tuner rod included in the plurality of tuner units may have different heights.

Further, each tuner gap included in the plurality of tuners may have different gap sizes.

In addition, the internal resonance frequency and power of the high-power magnetron including the asymmetric tuner may be determined by adjusting the tuner gap.

In addition, the internal resonance frequency and power of the high-power magnetron including the asymmetric tuner may be determined by adjusting one tuner gap, and the other tuner gaps may be fixed.

In addition, the tuner pin may be made of any one of a metal, a dielectric, and a metal-to-dielectric bonding structure.

And, according to another aspect of the present invention, a high-power magnetron including the asymmetric tuner unit; And a particle accelerator connected to the high-power magnetron including the asymmetric tuner unit and accelerating the particles by using electromagnetic wave energy generated from the high-power magnetron including the asymmetric tuner unit.

According to the high-power magnetron including the asymmetric tuner unit according to the present invention, by applying the asymmetric tuner unit, there is an effect that the internal resonance frequency of the high-power magnetron can be more precisely adjusted.

And, according to the high-power magnetron including the asymmetric tuner unit according to the present invention, the shape of the tuner rod and the tuner pin of the asymmetric tuner unit is designed to be asymmetric so that the frequency of the variable internal resonance frequency of the high-power magnetron (FREQUENCY STEP) can be precisely adjusted according to user requirements. There is an effect that can be designed.

1 is a view showing the structure of a conventional high-power magnetron including a symmetric tuner unit.
FIG. 2 is a diagram illustrating a high-power magnetron including an asymmetric tuner portion having a different cross-sectional area of a tuner pin in a high-power magnetron including an asymmetric tuner portion according to an embodiment of the present invention.
3 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different height of a tuner pin in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.
4 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different cross-sectional area of a tuner rod in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.
5 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different height of a tuner rod in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.
6 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different tuner gap size in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.
7 is a graph showing a change in frequency of an electromagnetic wave according to a cross-sectional area of a tuner pin in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.
8 is a graph showing a change in frequency of an electromagnetic wave according to a size of a tuner gap in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used interchangeably in consideration of only the ease of preparation of the specification, and do not have meanings or roles that are distinguished from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all modifications included in the spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various elements, but the elements are not limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

FIG. 2 is a diagram illustrating a high-power magnetron including an asymmetric tuner portion having a different cross-sectional area of a tuner pin in a high-power magnetron including an asymmetric tuner portion according to an embodiment of the present invention.

A conventional tuning structure in a high-power magnetron is a structure in which an internal resonance frequency is adjusted using one tuner or two symmetric tuners, but a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention It may have a structure that adjusts the internal resonance frequency of the high-power magnetron by using a plurality of tuners having an asymmetric structure. Hereinafter, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention shown in FIGS. 2 to 6 will be described with respect to a high-power magnetron including two asymmetric tuner units, but the present invention is not limited thereto, A high-power magnetron including an asymmetric tuner unit according to another embodiment of the present invention may include three or more asymmetric tuner units.

Referring to FIG. 2, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention may include a dipole tube 230 and a tuner unit. The dipole tube 230 may include a cathode 231 and an anode 232, and particles may be emitted from the cathode by voltage applied to the cathode and the anode. The emitted particles are subjected to circular motion according to Lorentz force by a magnetic field applied through a magnet part (not shown) in the magnetron or the like, and can also accelerate motion by the applied electric field.

The tuner unit may include a tuner pin and a tuner rod formed to be spaced apart by a tuner gap. The tuner pin may have a column shape having a certain cross-section, and for example, may have a cylindrical shape having a certain radius. The tuner rod may have a pillar shape formed in the direction of the center of the cathode by being spaced apart from the tuner pin by a certain distance (tuner gap).The tuner rod is in the direction of the head and the tuner pin carved to correspond to the shape of a resonator. In the shape of a column having a certain cross-section, it may include a body portion of a shape cut in a diagonal line so as to be spaced apart from the tuner pin by a certain distance (tuner gap). For example, the body portion of the tuner rod may have a cylindrical shape having a constant radius with one end cut diagonally.

The tuner unit may change the electric field distribution in the dipole tube 230. More specifically, the particles rotating through the magnetic field and electric field applied to the dipole tube 230 and the dipole tube 230 generate resonance at a specific frequency, and through this, they are spatially aggregated to have an AC component. do. An electromagnetic wave having a certain resonant frequency is generated by the AC component of these particles, and the generated electromagnetic wave may be radiated to the outside through an output unit (not shown, consisting of an antenna, etc.).

에 비례하므로, 튜너 갭 조절에 따라 변화되는 커패시턴스(C)를 이용하여 내부 공진주파수를 조절할 수 있게 된다. 고출력 마그네트론에서 커패시턴스는 튜너갭을 형성하는 튜너핀의 단면적 및 튜너로드의 단면적에 의해 영향을 받으며, 튜너갭의 크기에도 영향을 받을 수 있다. 따라서, 본 발명의 일 실시 예에 따른 비대칭 튜너부를 포함하는 고출력 마그네트론은 고출력 마그네트론에서 각각 튜너핀, 튜너로드 및 튜너갭을 포함하는 비대칭으로 설계된 2이상의 튜너부를 포함함으로써 고출력 마그네트론의 주파수 주절 작업을 위한 내부 공진주파수 조절을 보다 정밀하게 수행할 수 있는 방법을 제공할 수 있다. And, the frequency control of the electromagnetic wave generated from the high-power magnetron may be performed by the tuner. In more detail, it may be performed by using that the capacitance of the equivalent circuit is changed by adjusting the tuner gap (expressed as Gap or Distance) of the tuner unit. That is, the internal resonance frequency is

Since it is proportional to, it is possible to adjust the internal resonance frequency by using the capacitance (C) that changes according to the tuner gap adjustment. In a high-power magnetron, the capacitance is affected by the cross-sectional area of the tuner pin forming the tuner gap and the cross-sectional area of the tuner rod, and may be affected by the size of the tuner gap. Accordingly, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention includes two or more tuner units designed as asymmetrical units each including a tuner pin, a tuner rod, and a tuner gap in the high-power magnetron. It is possible to provide a method to perform the internal resonance frequency adjustment more precisely.

Referring to FIG. 2, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention may include a first tuner unit 210 and a second tuner unit 220 having an asymmetric shape. As an example, the first tuner pin 211 included in the first tuner part 210 and the second tuner pin 221 included in the second tuner part 220 may have different shapes. , The first tuner pin 211 and the second tuner pin 221 may have a column shape with different cross-sectional areas. If the shape of the first tuner pin 211 and the second tuner pin 221 is a cylindrical shape, the first tuner pin 211 and the second tuner pin 221 may have a cylindrical shape having different radii. In addition, the tuner pins 211 and 221 may be metal or dielectric. Alternatively, the tuner pins 211 and 221 may be made of a metal-dielectric junction structure.

3 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different height of a tuner pin in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.

Referring to FIG. 3, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention may include a first tuner unit 210 and a second tuner unit 220 having an asymmetric shape. As an example, the first tuner pin 211 included in the first tuner part 210 and the second tuner pin 221 included in the second tuner part 220 may have different shapes. , The first tuner pin 211 and the second tuner pin 221 may have pillar shapes having different heights.

4 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different cross-sectional area of a tuner rod in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.

Referring to FIG. 4, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention may include a first tuner unit 210 and a second tuner unit 220 having an asymmetric shape. As an example, the first tuner rod 212 included in the first tuner unit 210 and the second tuner rod 222 included in the second tuner unit 220 may have different shapes. , The first tuner rod 212 and the second tuner rod 222 may have a pillar shape with different cross-sectional areas of the body portion. If the shape of the trunk portion of the first tuner rod 212 and the second tuner rod 222 is a cylindrical shape having a constant radius with one end cut diagonally, the first tuner rod 212 and the second tuner rod 222 The body portion may have a cylindrical shape having a constant radius in which one end having a different radius is cut diagonally.

5 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different height of a tuner rod in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.

Referring to FIG. 5, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention may include a first tuner unit 210 and a second tuner unit 220 having an asymmetric shape. As an example, the first tuner rod 212 included in the first tuner unit 210 and the second tuner rod 222 included in the second tuner unit 220 may have different shapes. , The first tuner rod 212 and the second tuner rod 222 may have a pillar shape having different heights of the body portion. If the shape of the trunk portion of the first tuner rod 212 and the second tuner rod 222 is a cylindrical shape having a constant radius with one end cut diagonally, the first tuner rod 212 and the second tuner rod 222 The body portion may have a cylindrical shape having a constant radius in which one end having a different height is cut diagonally.

According to another example in which the first tuner rod 212 included in the first tuner unit 210 and the second tuner rod 222 included in the second tuner unit 220 are different in shape, any one tuner rod The shape of the body portion of is a cylinder shape having a constant radius cut at one end by an oblique line, and the body portion of the second tuner rod 222 may be a cylinder shape bent at a predetermined angle.

Alternatively, the body portions of the first tuner rod 212 and the second tuner rod 222 are both cylindrically bent at a certain angle, but the length of the trunk portions of the first tuner rod 212 and the second tuner rod 222 May be of different shapes.

6 is a diagram illustrating a high-power magnetron including an asymmetric tuner unit having a different tuner gap size in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.

Referring to FIG. 6, a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention may include a first tuner unit 210 and a second tuner unit 220 having an asymmetric shape. As an example, the first tuner gap 213 included in the first tuner unit 210 and the second tuner gap 223 included in the second tuner unit 220 may have different sizes. , The first tuner gap 213, which is a distance between the first tuner pin 211 and the first tuner rod 212, and a second tuner, which is a distance between the second tuner pin 221 and the second tuner rod 222 The size of the gap 223 may be different.

In a high-power magnetron including an asymmetric tuner according to an exemplary embodiment of the present invention, the electromagnetic wave frequency and power may be determined by adjusting the first and second tuner gaps 223. Alternatively, an electromagnetic wave frequency and power may be determined in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention by adjusting any one tuner gap while fixing the other tuner gap other than any one tuner gap. have.

7 is a graph showing a change in frequency of an electromagnetic wave according to a cross-sectional area of a tuner pin in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention.

Referring to FIG. 7, the trunk portions of the first tuner rod 212 and the second tuner rod 222 have a cylindrical shape with a radius of 3.5 mm in cross section, and the first tuner pin 211 has a radius of 4.9 mm in cross section. In the cylindrical shape, as a result of changing the cross-sectional radius of the cylindrical second tuner pin 221 from 0.9mm to 4.9mm, the internal resonance frequency of the high-power magnetron was changed from 3.0071 GHz to 2.9982 GHz, resulting in a total of 8.9 MHz. It can be seen that the internal resonance frequency can be adjusted.

8 is a comparison of the electromagnetic wave frequency change according to the size of the tuner gap in the high-power magnetron including the asymmetric tuner unit according to an embodiment of the present invention with the electromagnetic wave frequency change according to the size of the tuner gap in the conventional high-power magnetron including a symmetric tuner unit. It is a graph shown.

Referring to FIG. 8, in a high-power magnetron including a conventional symmetric tuner part, the first tuner pin and the second tuner pin have a cylindrical shape with a radius of 4.9 mm in cross section, and the trunk portions of the first tuner rod and the second tuner rod are Assuming that the cross-section is a cylindrical shape with a radius of 3.5 mm, as a result of changing the second tuner gap from 1.0 mm to 3.0 mm with the first tuner gap fixed at 1.0 mm, the internal resonance frequency of the high-power magnetron was at 2.9982 GHz. It is changed to 3.0074 GHz, so you can check the internal resonance frequency change of 9.2 MHz.

Meanwhile, in a high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention, the first tuner pin 211 has a cylindrical shape having a cross section of 4.9 mm, and the second tuner pin 221 has a cross section radius of 1.9 mm. The first tuner rod 212 and the second tuner rod 222 have a cylindrical shape with a radius of 3.5 mm in cross section, and the first tuner gap 213 is fixed to 1.0 mm. As a result of changing the second tuner gap 223 from 1.0mm to 3.0mm in the state, the internal resonance frequency of the high-power magnetron is changed from 3.0025 GHz to 3.0091 GHz, so that a total internal resonance frequency change of 6.6 MHz can be confirmed.

Accordingly, referring to FIG. 8, according to the high-power magnetron including an asymmetric tuner unit according to an embodiment of the present invention, it can be confirmed that more precise internal resonance frequency adjustment is possible.

According to the high-power magnetron including the asymmetric tuner unit according to the present invention, by applying the asymmetric tuner unit, there is an effect that the internal resonance frequency of the high-power magnetron can be more precisely adjusted.

And, according to the high-power magnetron including the asymmetric tuner unit according to the present invention, the shape of the tuner rod and the tuner pin of the asymmetric tuner unit is designed to be asymmetric so that the frequency of the variable internal resonance frequency of the high-power magnetron (FREQUENCY STEP) can be precisely adjusted according to user requirements. There is an effect that can be designed.

It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. In addition, the above detailed description should not be construed as restrictive in all respects and should be considered as illustrative.

The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

210: first tuner unit
211: first tuner pin
212: first tuner rod
213: first tuner gap
220: second tuner unit
221: second tuner pin
222: second tuner rod
223: second tuner gap
230: Yi Kuk-gwan

Claims (12)

In a high-power magnetron,
A dipole tube including a cathode and an anode, and
Including a plurality of tuner parts for varying the electric field formed in the dipole tube,
The tuner unit includes a tuner pin and a tuner rod formed to be spaced apart by a tuner gap, and the plurality of tuner units have a mutually asymmetric structure. A high-power magnetron including an asymmetric tuner unit.
The method of claim 1,
Each of the tuner pins included in the plurality of tuner units has a structure having a different shape from each other. A high-power magnetron including an asymmetric tuner unit.
The method of claim 2,
Each of the tuner pins included in the plurality of tuner units has a columnar shape having different cross-sectional areas. A high-power magnetron including an asymmetric tuner unit.
The method of claim 2,
Each of the tuner pins included in the plurality of tuner units has a column shape having different heights from each other. A high-power magnetron including an asymmetric tuner unit.
The method of claim 1,
Each of the tuner rods included in the plurality of tuner portions has a structure having a different shape from each other, and a high-power magnetron including an asymmetric tuner portion.
The method of claim 5,
Each of the tuner rods included in the plurality of tuner units has a columnar shape having different cross-sectional areas. A high-power magnetron including an asymmetric tuner unit.
The method of claim 5,
Each of the tuner rods included in the plurality of tuner units has a shape having a different height from each other. A high-power magnetron including an asymmetric tuner unit.
The method of claim 1,
Each of the tuner gaps included in the plurality of tuner units has a different size of gaps. The high-power magnetron includes an asymmetric tuner unit.
The method of claim 1,
The high-power magnetron comprising an asymmetric tuner, characterized in that the internal resonance frequency and power of the high-power magnetron including the asymmetric tuner is determined by adjusting the tuner gap.
The method of claim 9,
The high-power magnetron including an asymmetric tuner, characterized in that the internal resonance frequency and power of the high-power magnetron including the asymmetric tuner are determined by adjusting one tuner gap, and the other tuner gap is fixed.
The method of claim 1,
The tuner pin is a high-power magnetron including an asymmetric tuner portion, characterized in that made of any one of a metal, a dielectric, and a metal-dielectric junction structure.
The method of claim 1,
A high-power magnetron including the asymmetric tuner unit; And
A particle accelerator comprising a particle accelerator connected to the high-power magnetron including the asymmetric tuner unit and accelerating the particles using electromagnetic wave energy generated from the high-power magnetron including the asymmetric tuner unit.

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